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As a part of the fundamental researches on the use of a laser beam for physical control of weed, pest and disease, the effect of using a laser beam on the rice plant was studied. The laser beam of 53...
Cultivar Difference in the Effect of Sulfur Dioxide on the Photosynthetic Rate at Flag Leaf of Rice Plants
Inhibitory rate Photosynthesis Rice Sulfer dioxide
2009/7/8
The effects of sulfur dioxide on photosynthetic rate at the flag leaf of rice plants at 10 days after the heading stage were studied with various cultivar. Sulfur dioxide was supplied at the rate of 2...
Effect of High Temperature on Grain Ripening in Rice Plants—Analysis of the effects of high night and high day temperatures applied to the panicle and other parts of the plant
Grain quality High day temperature High night temperature Rice Ripening Panicle Grain dimension
2009/7/8
Average rice grain weight decreases under a high night temperature condition, and the quality of rice grain becomes poor under either high night or high day temperature condition. The effects of expos...
Yield and Root Morphology in Rice Plants Infected by Bacterial Grain Rot (Pseudomonas glumae Kurita and Tabei)
Stunted root Pseudomonas glumae Number of roots Root system Yield Yield components
2009/7/8
Pathogens and insects seem to attack unhealthy plants, and the trace of unhealthy growth may remain in the plant organs after attack. Grain yield of rice plants infected with bacterial grain rot (Pse...
Relationship between the Numbers of Crown Roots and Stems per Hill in Rice Plants
Lower shoot unit roots Non–productive stem Number of roots Number of stems Productive stem
2009/7/8
Crown roots consist of elongating roots and stunted roots, and are classified into upper shoot unit roots, lower shoot unit roots, and prophyll shoot unit roots according to shoot unit theory. The re...
Serial Change of Nitrogen Uptake after Topdressing for Rice Plants
Bleeding sap Lowland rice Nitrogen uptake Topdressing
2009/7/8
The change of nitrogen (N) uptake after topdressing was estimated from the N concentration in bleeding sap and bleeding rate of the sap in a lowland rice variety, Koshihikari, grown in a pot and in th...
Method of Estimating the Variation of Growth Stages on the Basis of the Regularity of Morphogenesis in Rice Plants
Critical stages of cool temperature Development model Developmental stage Flowering date Glumous flowers Growth variation Mature stage
2009/7/8
We modified the development model established for early warning of cool-weather damage to estimate the percentage of productive panicles and glumous flowers at a specific stage such as meiosis, in th...
Studies on the Yielding Ability of Rice Plants Cultured by the Multiple Row Planting of Mature Seedling—A Case Study at Kikuchi District in Kumamoto Prefecture
6th leaf emerging seedlings Koshihikar Minaminishiki Multiple row planting Transplanting method
2009/7/8
In 1986, a new-type transplanting machine for the 6th leaf-emerging seedlings was introduced to two innovative farmers' groups at Kikuchi district in Kumamoto Prefecture where transplanting machines ...
Influences of the Drainage Day after Seeding on Emergence and Establishment of Submerged Direct-Sown Rice Plants
Air permeability of soil Drainage day Rice Seedling emergence Seedling establishment Submerged direct seeding
2009/7/8
We investigated the effects of the drainage day after submerged direct seeding on the emergence and establishment of rice seedlings in pot experiments for the application of the new direct seedin...
Relationship between of Root Activity of Rice Plants and Salt-Wind Damage by Typhoon 15 in 2004
Bleeding rate Rate of dead leaf Silicon content Strong wind
2009/7/8
Typhoon 15 passed through the Sea of Japan on August 20,2004. The typhoon caused salt-wind damage on rice plants in the Sea of Japan coast part. To investigate the effect of root activity on the salt-...
Influences of Simultaneous Shot of Fertilizer and Seed and Drainage of Flooded Water after Seeding on Seedling Emergence and Establishment and Early Growth of Rice Plants in Submerged Hill Seeding
Ammonium nitrogen Drainage of flooded water Fertilizer shot Rice Root length
2009/7/8
The effect of shooting a slow-release fertilizer with the seed and draining after submerged direct seeding on the establishment of rice seedlings were investigated in pots and containers using a “sho...
Estimation of Sterility Percentage Caused by Cool Temperature in Rice Plants Using Nonparametric Regression
Cool degree days Cool summer tolerance Nonparametric regression Paddy rice Sterility caused by cool summer
2009/7/8
To evaluate the incidence of cool summer damage as early as possible, we made a model to estimate the sterility percentage from the cool degree days in the consecutive developmental stages of young p...
Relative Amount and Physiological Activity of Roots Affect the Resistance to Cool Weather at the Young Microspore Stage through the Number of Pollen Grains in Rice Plants
Rice Pollen Number of Pollen Grains Cool-weather resistance Nitrogen
2009/7/7
The relative amount of roots (dry weight ratio of root to shoot, or root dry weight per spikelet) or the physiological activity of roots is correlated with the cool-weather resistance in rice plants. ...
Comparison of the Degree of Damage between Rice Plants Sprayed with Seawater and Exposed to Salty Wind Damage by the Typhoon No.15 in 2004
Sea water Artificial reproduction Rice yield Salty wind damage Amount of NaCl adhesion per panicle
2009/7/7
The decrease in the rice yield caused by salty winds is due to the increased amount of sodium (Na) adhered to panicles and leaves. The effect of the amount of Na adhered to plants on the yield of ric...
Development of sheath blight caused by Thanatephorus cucumeris on no-till and non-paddy rice plants treated with compound fertilizers
Thanatephorus cucumeris rice plants no-till cultivation disease development
2009/3/17
Epidemics of sheath blight caused by Thanatephorus cucumeris, on no-till and non-paddy rice plants were compared with those on conventionally tilled rice plants in paddy fields treated with compound...